fix: allow multiple instances for gitlab repo fetch

Signed-off-by: frank-zsy <syzhao1988@126.com>

Author: frank-zsy

src/cron/tasks/updateGitlabRepos.ts

@@ -9,7 +9,7 @@ import { get } from 'https';
  */
 const task: Task = {
   cron: '0 * * * *',
-  singleInstance: true,
+  singleInstance: false,
   callback: async () => {
     const logger = getLogger('UpdateGitlabRepoTask');
     const config = await getConfig();